Weekend Workshop: How to easily build a DIY hand-powered LED flashlight

By Rick Stella Published September 10, 2016

Need something to keep you busy this weekend? We’ve got you covered. The Weekend Workshop is our weekly column in which we showcase a badass DIY project that you can complete with minimal skills and expertise. We’ve dug through all the online tutorials and gone the extra mile to pinpoint projects that are equal parts easy, affordable, and fun. So put on your work pants, grab your tool belt, and head to the garage. It’s time to start building!

You never quite realize how critical a proper LED flashlight is until you absolutely need one. Making things worse, buying spare batteries is something a lot of us forget to do in this age of rechargeable devices, so a simple AA swap isn’t always an option. However, what is an option is using some old-fashioned elbow grease to boot up that handy light in a mere matter of minutes.

Weekend-Workshop-091016_ — ROBO HUB/Instructables

ROBO HUB/Instructables

Recommended Videos

Thanks to some tinkering, an Instructables user by the name of Robo Hub created a hand-powered LED flashlight. With nothing more than an old soda can, some small LED lights, a 12-volt DC motor, and some reflective tape, anyone can easily construct one of these lights in under an hour. Sure, pulling a Maglite out of your backpack while hiking makes you feel cool, but if you really want to wow your friends, show off your hand-cranking skills.

To help you build this innovative flashlight, we’ve gone ahead and sifted through Robo Hub’s walkthrough to piece together an exact build list. As is the case with most projects using a hot glue gun, we recommend having a general understanding of how to use a hot glue gun so as to avoid any injury. If you don’t feel comfortable, find someone to help or skip this project altogether. With that said, here’s what you’ll need to get started:

Tools:

Hot glue gun with glue sticks
Reflective tape
6-inch string of metal

Materials:

12-volt DC motor
Empty soda can
Pair of small LED lights with wires
Top of old soda bottle

With the necessary tools and materials at the ready, it’s now time to start piecing together this DIY hand-powered flashlight. Simply follow Robo Hub’s step-by-step Instructables walkthrough and in less than 30 minutes, you’ll have your very own elbow grease ready LED torch. Happy building!

The entire walkthrough for building this DIY hand-powered LED flashlight can be found over at Instructables.

Topics

Former Digital Trends Contributor

Rick became enamored with technology the moment his parents got him an original NES for Christmas in 1991. And as they say…

Cars

Cadillac offers first glimpse of upcoming Optiq-V performance EV

cadillac optiq v teaser ev

Cadillac has released the first official teaser images of the 2026 Optiq-V, offering a preview of the brand’s second all-electric model to join the performance-focused V-Series lineup. The images, which highlight subtle styling upgrades, mark the first confirmation of the new variant ahead of its full reveal later this year.
The Optiq-V builds on the foundation of the standard Optiq, Cadillac’s compact electric SUV introduced for the 2025 model year. According to the automaker, this V-Series version will feature a more dynamic driving experience, with enhancements to steering, suspension, and overall agility. While technical details remain limited, Cadillac’s press release emphasizes that the Optiq-V was engineered for “precision” and an “exhilarating” feel behind the wheel.
Reports from CarScoops suggest the Optiq-V could produce up to 515 horsepower through a dual-motor all-wheel-drive system, significantly surpassing the 300 horsepower of the base model. Teaser images reveal a diamond-pattern mesh grille, V-Series badging, and a rear spoiler — all nods to its performance orientation. Photos also hint at additional visual updates, such as redesigned bumpers, 21-inch wheels, and larger brakes.
The base Optiq, reviewed recently by Digital Trends, is positioned as Cadillac’s entry-level EV and shares its underpinnings with the Chevrolet Equinox EV. Despite that connection, the Optiq features premium materials, a curved 33-inch display, Google built-in tech, and standard dual-motor all-wheel drive. While the review noted some drawbacks in steering feel and performance tuning, it praised the vehicle's cabin quality and overall comfort.
The Optiq-V is expected to retain the standard model’s 85-kWh battery and roughly 300-mile range, though final figures have yet to be announced. Cadillac says more details on specs and pricing will be available closer to the model’s official launch.
With the addition of the Optiq-V, Cadillac continues expanding its electric lineup while reinforcing its V-Series as a key part of its identity — now in the EV era.

Cars

Nissan delays price increases until June amid U.S. tariffs

nissan rogue hybrid 2025 2024

Nissan buyers, take note: if you're eyeing a new ride, you might want to make your move before summer. The automaker has announced it won’t raise prices on imported vehicles until at least June 2, giving car shoppers a brief reprieve from the impact of the new 25% U.S. import tariffs.
According to a memo sent to U.S. dealers and reported by Automotive News, Nissan is able to hold prices steady thanks to a stockpile of tariff-free vehicles—enough to last nearly three months. But once that inventory runs dry? Prices are likely heading north. Nissan’s U.S. sales chief Vinay Shahani assured dealers that the company is working to "minimize the impact" of tariffs on customers, but he was also frank: “There will be an impact.”
To soften the blow, Nissan is ramping up production at its U.S. plants in Smyrna, Tennessee, and Canton, Mississippi. Those factories were only running at about half capacity last year, so there’s plenty of room to grow. The Rogue—Nissan’s best-seller—will get a second shift on its assembly line, increasing production by about 60,000 vehicles. Other models like the Pathfinder, Frontier, and Murano will also see higher domestic output.
The goal? Build more cars stateside and dodge the tariff altogether.
Nissan’s move puts it in line with other automakers holding the line on prices—at least for now. Hyundai, Toyota, and Honda have made similar pledges, while rivals like Ford and Stellantis are rolling out temporary discounts to ease the pain.
As Digital Trends noted, Nissan’s decision comes as it rethinks its production and pricing strategy in the face of shifting trade policies and a nervous market. With high-volume imports like the Sentra and Ariya still coming from Mexico and Japan, this pricing grace period might not last long.

Cars

Buick, Audi, and Nissan score top marks in latest IIHS safety ratings

2025 Audi Q6 e-tron front quarter view.

The Insurance Institute for Highway Safety (IIHS) has added four more vehicles to its coveted 2025 Top Safety Pick and Top Safety Pick+ lists. If you appreciate knowing your vehicle is built with safety in mind, this update is worth noting.

Among the standout performers: the Audi Q6 e-tron, Buick Enclave, and Nissan Armada—each earning the institute’s highest honor, the Top Safety Pick+ award. The GMC Acadia also made the grade, picking up a Top Safety Pick award. For Buick and GMC, these honors mark a significant return to form, as neither brand had received IIHS awards in several years. In fact, it’s the first time since 2013 that the Enclave has been recognized.
So, how does IIHS hand out these awards? Picture a battery of tests that simulate real-world crashes—everything from small overlap front impacts to updated side crashes. To make the list, vehicles must ace (i.e., earn a “good” rating in) key crashworthiness tests, show competence in pedestrian crash prevention, and offer headlights that don’t blind oncoming drivers. For the higher-tier Top Safety Pick+, there's an extra hurdle: a “good” rating in the updated moderate front overlap test, which now factors in rear-seat passenger protection.
Improvements to the Enclave and Acadia’s headlights, introduced after January 2025, helped push them over the finish line. Unfortunately, not all models in this testing round were so lucky. The Cadillac Lyriq, Audi Q6 Sportback e-tron, Kia K4, and several Nissan models—including the Kicks, Rogue, and Sentra—fell short. Common issues? Poor headlight performance or incomplete testing.
The IIHS notes that these evaluations are ongoing. Not every vehicle released for 2025 has been fully assessed, and late-year updates can still improve a model’s score. For the full list of safety awards, you can check out the IIHS website.